Examples from the Web for unbeknownst
In reality, he and been off in Argentina with his girlfriend, unbeknownst to his wife.
Unbeknownst to him, the orb contains an Infinity Stone, which holds within it the power to destroy entire planets.‘Guardians of the Galaxy’ Filmmaker James Gunn on His Glorious Space Opera and Rise to the A-List|Marlow Stern|August 3, 2014|DAILY BEAST
Unbeknownst to Rullo, Scotto had not only been caught by the feds but agreed to cooperate with them.
Unbeknownst to Butler, that issue already existed—and Westbrook was, naturally, its cover star.
But, unbeknownst to the Italians, the men in the boat—identified as Ajesh “Pinky” Bink and Jelestine—were not pirates after all.
Besides, we have so grave a general as Sherman alluding to the "Unbeknownst" in an official document.The Lincoln Story Book|Henry L. Williams
But unbeknownst to it, this very violence thrived on these pecuniary fertilizers.After the Rain|Sam Vaknin
That's 'bout the only way he'll ever do one, Frank, unbeknownst like.Old Man Curry|Charles E. (Charles Emmett) Van Loan
Unbeknownst to yourself, dear, you bore him what he wanted, and what I wanted.The Soul of Susan Yellam|Horace Annesley Vachell
I got acquainted with the porter, and he blacked my boots in the night unbeknownst to me, while I was engaged in slumber.Remarks|Bill Nye